#include<stdio.h>

int main()
{
	double y=0.0;
	int i;
	int m;
	printf("Enter m:");
	scanf("%d",&m);
	for(i=1;i<=m;i++)
	{
		y+=1.0/(2.0*i*i);
	}
	printf("\nThe result is%f\n",y);
}
